Shuttle



Dec. 19, 1922. 1,439,322.

L. PAVl-A.

SHUTTLE. FICED DEC 5. 1921.

WM i .LUHPMM, i: 1 x- ATTORNEY Patented '7 Pag are W": V i

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LUIGI ravi'n, or niini n'rown, rnnnsxiivanre.

si-iurrns.

Application filedmecember and useful Improvements in Shuttles, of

which the following is a specification. This invention relates totension means for shuttles in which thread guides are .lormed bystraight pins set in the shuttle body. Usually these pins are embodiedin the shuttle hydrilling holes in the shuttle body part way through thesame, fitting the pins in the holes and then filling in the exposed endsof the holes, to cover the outer ends of the pins, with wax or othersuitable plastic 'material. The pins become worn with niclrs by thethread, and to remote them and reinsert them in changed positions orsubstitute for them new ones cannot well be doneby the Weaver himself,who is generally without the necessary plastic material to complete thework and also lacks the skill to do it properly. My object is to provide[for mounting the pins so that the weaver himself. or any otheritinslrillecl person, can change the positions of the pins or substitutefor them new ones when they are worn; a :l urther object isto makeprovision forthe accurate: centering of the pin when the work ofrepositioning the pin or equipping it with a new one is completed.

in the drawing, Figure l is a plan view of a fragment of a shuttleembodying my invention;

Figure 2 is aside elevation, showingthe shuttle inverted; and Figure 3is a sectional view on the line 38 of Fig. l.

The shuttle body a has the cavity 6 for the wound package and, forwardof such cavity, the usual cavity 0 for the tension means (to bedescribed), cavity 0 extending through the shuttle from one side to theother. v I

A well'known type of tension means is shown, the same consisting of amember a? which is pivoted on a stud eand has loops d" to'forin threadguides, and a series of ,parallel plns'f which form fixed thread guides,the thread being adapted to. extend zi'g-z'ig fashion back and fortharound the pins fand through theloops d alternately and when undertension to shift the memher (i against the tension of a spring 9 from 5,1921. serial netiesii.

the position shown inv Fig. l to a position where thethread would extendmore or less straight a v Ordinarily pins f are stepped in holes itwhichreach toward but not to the adjoining exterior face of the shuttle. (inthe present case, the bottom face of the shuttle wlncli in Fig. 2 18shown uppermost), their outer ends being in correspondlng holes *drilledin alinenient with the holes h from theother or top face of the shuttlethrough to the cavity.

in the present invention said pins are stepped. in the holes, as 72,, asbefore. .And they also pass through holes 2' drilled through the shuttlebody in alin'ement with the holes it from the top face of the shuttle tothe cavity 0. But the holes 2' have countersinhs j, which arethreaded,uand into these countersinhs are tapped the screws 70, eachscrew having at its inner end an axial recess/I in which thecorresponding-{pin is stepped and inwhich it fits snugly the same itdoes in the hole It.

It a pin becomes worn with a nick or 'u' x I r 4- i u otneii ise, and,requires, to be sh fted rotatively or to he removed and new onesubstituted the screw leis removed, the necessary. change made and thenthe screw returned and made to bind the pin again'in place. i l v I lhave found that it is important to provide the screw with an axialrecess, and especially a cylindricalone, inwhich the to fit only thehole snugly, because -removals of the pin "wouldin time enlarge orotherwisedistort the hole, or if it were stepped-inn 1 merely conicalhole in the screw, hecause in this case slight withdrawal oi the screwwould lead to looseness and I consequent abilityoil the pin to shiftoutof centered position? it prevents the pin '90 pin is stepped and whichit snugly fits. j

from turning. the pin is alloyed to turn i on its own axis it" willeventually work around until" the nick already formed is U again trackedby the thread, and remain in that position, thus defeating the principalpurpose of the invention.

Having thus fully described my" inveu tion, what ll claim as new anddesire to secure by Letters Patentsis 1. The 'coinbination of a shuttlea hav *ing' a cavity therein and a hole extending i'rom one outer faceof the body to the cawit and another hole allned with the first. holeand extending from the cavity toward but not to the opposite face of thebody, the

and held centered by-the second hole, and a screw tapped into thecountersink and binding the pin against its step in the sec and hole.

2. The combination of shuttle body haw ing a eavit v therein and a holeextending froin one outer face of the body to the cavity and anotherhole alined with the first hole and extending from the cavity toward butnot to the opposite face; of the body, a pin stepped at one end in andheld centered by the second holeyand a screw tapped into the first holeand'binding the pin against its step in the second hole said screwhaving an axial cylindrical recess in which the other end of the pin isstepped and which it snugly fits. v

' In testimonywhereof I afiix my signature.

' LUIGI PAVIA.

